Phonon Spectrum in a Nanoparticle Mechanically Coupled to a Substrate

Details Phonon Spectrum in a Nanoparticle Mechanically Coupled to a Substrate Phonon Spectrum in a Nanoparticle Mechanically Coupled to a Substrate

2001-06-26

arxiv.org/abs/cond-mat/0106544v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 2 figures, Revtex

Scientific paper

10.1016/S0022-2313(01)00358-1

We calculate the vibrational density-of-states in an insulating nanoparticle that is in weak mechanical contact with a semi-infinite substrate. The work is motivated by a recent experiment by Yang et al., where the low-energy phonon density-of-states of Y2O3 nanoparticles doped with Eu was measured. Preliminary results presented here, based on the conventional quasiparticle-pole approximation for the phonon propagator, are in reasonable agreement with experiment.

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